updated for version 7.3.506
Problem:    GTK gives an error when selecting a non-existent file.
Solution:   Add a handler to avoid the error. (Christian Brabandt)
diff --git a/src/version.c b/src/version.c
index 7aff254..9f36e4c 100644
--- a/src/version.c
+++ b/src/version.c
@@ -715,6 +715,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    506,
+/**/
     505,
 /**/
     504,